Improvement in flour-bolts



(si.) ROSWELL H. ST. JOHN.

Flour Bolt. l

Patented Dec. 5,1871.

INVENTOR. fsm @MM2/ UNITED STATES PATENT FFIC'E ROSWELL H. ST. JOHN, OF BELLEFONTAINE, OHIO, ASSIGNOR TO HIMSELF, JA- OOB PIM, AND JOHN MARSHALL, OF SAME PLACE.

IMPROVEMENT IN FLOUR-BOLTS.

Specification forming part of Letters Patent N o. 121,681, dated December 5, 1871.

To all whom t may concern:

Be it known that I, RoswnLL H. ST. J oHN, of Bellefontaine, in the county of Logan and State of Ohio, have invented an Improved Flour-Bolt Knocker, of which the followingis a specifica tion:

One or more pivoted hammers and strikingsurfaees therefor are applied to the ribs of the reel and coupled by crank-arms to longitudinal pull-rods of flat bar-iron, furnished with retracting springs, and connected by bell-cranks and links to levers pivoted to the reel-shaft, and furnished at their outer ends with friction-rollers to engage the tripper. This is pivoted so as to oscillate freely, and so controlled by stops, one of which is adjustable, as to impart through the hammers blows of variable force, whether the reel revolves forward or backward. My invention consists in the construction of the said tripper; in the employment of levers, bell-cranks, and connecting-links to operate the hammers through pulls-rods; and in the said combina-tion of parts.

Figure l is an interior longitudinal elevation of a iionr-bolt chest and reel provided with my improved knocker. Fig. 2 is a transverse section on the lines 2, Fig. l, showing by .full and dotted lines the two positions of the tripper.

A represents the bolt-chest, and B the reel. Z Z represent brackets attached to the inner faces of the ribs of the reel y y, hammers pivoted between lugs of the same; and r w, screws or nails assisting' to attach said brackets and furnishing striking-surfaces for the hammers. w w represent rods of flat bar-iron attached by rivets or bolts to crank-arms of the hammers y; c fu, staples driven in or attached to arms of the reel to guide the same; and u u, springs, (which may be spiral, as shown, or of elliptical or other preferred form,) applied between the said guides and pin-supported washers at the rear ends of the said rods, to resist the elevation of the hammers and forcibly lower them to produce the jar t t represent brackets attached to the reel-shaft and furnished with hin ge-lun gs and slotted guidestandards; s s, levers pivoted therein andfurnished with friction-rollers on their outer ends; 1^ 1', links; and q q, bell-cranks, connecting said levers to the rods w, the said bell-cranks being pivoted to arms of the reel. p p represent stops for limiting the motion of the bell-cranks q. C represents a tripping-cam pivoted loosely to the end ofthe chest in proper position to engage with the rollers on the ends of the levers s as they are carried past the same in either direction by the rotation of the reel for the purpose of lifting and tripping the hammers. o n are its two faces. m l are stops for supporting it in its two positions, as illustrated in Fig. 2, the former being an adjustable eccentric to enable variation of force of main stroke or the entire retraction of the tripper. The bell-cranks q, tripping-cam O and adjustable stop m are pivoted by attaching screws, and the other joints formed by riveted pintlcs; but these and other details are not essential. The striking devices may be applied to two or more ribs, or to but one, and more than one hammer to a rib may be employed.

The operation of the device will be fully apparent from the above.

What I claim as new in this my invention isl. The pivoted tripper C constructed with camfaces o and n, in combination with the stops m l, the former adjustable and of the form specilied, for the purpose set forth.

2. The levers s, bell-cranks q, and links r, in combination with the springs a, for operatin g the hammers y through pull-rods w, all constructed and arranged substantially as described.

ROSWELL H. ST. JOHN.

Witnesses:

PHILANDER J oNEs, E. P. LocKHART. (57) 

